Cloud Hypervisor is a Virtual Machine Monitor for Cloud workloads. From version 21.0 to before version 51.2, a guest can cause a use-after-free in the cloud-hypervisor process by submitting two virtio-block descriptor chains that reuse the same head_index while asynchronous block I/O is enabled (e.g. io_uring, aio). When the kernel completes the duplicate operation before the original, the completion path frees a bounce buffer that the kernel is still actively reading from or writing to, corrupting the freed memory. This issue has been patched in versions 51.2 and 52.0.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
cloud-hypervisor cloud-hypervisor affected
Version Status Constraints
>= 21.0, < 51.2 affected —

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/cloud-hypervisor/cloud-hypervisor/commit/1314ac883c641f1045bbb06dec0de045a3894baa cve-icon cve-icon
https://github.com/cloud-hypervisor/cloud-hypervisor/pull/8220 cve-icon cve-icon
https://github.com/cloud-hypervisor/cloud-hypervisor/releases/tag/v51.2 cve-icon cve-icon
https://github.com/cloud-hypervisor/cloud-hypervisor/releases/tag/v52.0 cve-icon cve-icon
https://github.com/cloud-hypervisor/cloud-hypervisor/security/advisories/GHSA-f47p-p25q-83rh cve-icon cve-icon
History

Tue, 09 Jun 2026 23:30:00 +0000

Type Values Removed Values Added
Description Cloud Hypervisor is a Virtual Machine Monitor for Cloud workloads. From version 21.0 to before version 51.2, a guest can cause a use-after-free in the cloud-hypervisor process by submitting two virtio-block descriptor chains that reuse the same head_index while asynchronous block I/O is enabled (e.g. io_uring, aio). When the kernel completes the duplicate operation before the original, the completion path frees a bounce buffer that the kernel is still actively reading from or writing to, corrupting the freed memory. This issue has been patched in versions 51.2 and 52.0.
Title Cloud Hypervisor: Use-after-free in virtio-block Async I/O Completion
Weaknesses CWE-416
References
Metrics cvssV4_0

{'score': 8.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-09T22:53:52.657Z

Reserved: 2026-05-13T07:45:21.252Z

Link: CVE-2026-45782

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-06-10T00:16:53.267

Modified: 2026-06-10T00:16:53.267

Link: CVE-2026-45782

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-10T01:00:12Z

Weaknesses